Acquisition-related Intangible Assets, Net

12 Months Ended

Jan. 31, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Acquisition-related intangible assets, net consisted of the following (in thousands):



	January 31,
	2019			2018
Developed technology	$	186,800		$	69,700
Customer relationships	189,000			1,000
Trade name	12,000			—
Backlog	11,000			—
	398,800			70,700
Less accumulated amortization	(85,560		)	(36,466		)
Acquisition-related intangible assets, net	$	313,240		$	34,234

Amortization expense related to acquisition-related intangible assets was $49 million, $19 million, and $13 million for fiscal 2019, 2018, and 2017, respectively.

As of January 31, 2019, our future estimated amortization expense related to acquisition-related intangible assets is as follows (in thousands):



Fiscal Period:
2020	$	68,856
2021	48,142
2022	43,733
2023	41,009
2024	29,833
Thereafter	81,667
Total	$	313,240